Steel scaffolding column



A. c. MORGEN 2,725,125

STEEL SCAFFOLDING COLUMN Nov. 29, 1955 Original Filed June 13, 1950 2 Shegts-Sheet 2 mmvrbk. 3 fiez vasffne CZ Mo/yea STEEL. SCAEFOLDINGL COLUMN Augustine C. Morgen, Yankton, I S., Dak.

Original application "June 13, 1950, Serial No. 167,733.

Dividedand this application June .15, 1-95 1, Serial No. 231,839

1 Claim. (Cl. 189-39) .This, invention relates to scaifolding of the typercommonly employed in structural operations, such-as in the laying up of .masonry and the like.

This. application is a division of my application, Serial .No. 167,733,.filed "June 13, '1950, and this application relates to a scaffold post per se.

The primary object of the invention is to support workmen and materials on different levels during the construction of a building or the .like and toenabl'e the level at which the workmen are supported to be varied as the construction progresses.

Another object of the invention is to support materials within convenient reach of workmen engaged in structural pursuits so as to avoid stooping and bending of the body and hence facilitate the rapidity with which the construction may progress.

Other objects and advantages will be apparent during the course of the following description.

In the accompanying drawings forming a part of this application, and in which like numerals are used to designate like parts throughout the same:

Figure 1 is a front view in elevation of scaffolding embodying the features of this invention;

Figure 2 is an end view of the scaffolding illustrated in Figure 1;

Figure 3 is a sectional view taken substantially along the line 3--3 of Figure 2;

Figure 4 is an enlarged detail View, partly in section, of the upper end of one of the columns showing the manner in which the crane arm is supported thereon.

Referring to the drawings in detail, this improved scaifolding comprises spaced, vertically extending columns and 12 joined by tie bars 14 and cross braces 16 to form a complete scaffolding unit upon which a platform designated generally 18 is mounted to move vertically. The present invention is specifically directed to the consruction of each of the columns 10 or 12, while the detailed structure of the scaffold bracket and post combination are shown and described in my parent application, Serial No. 167,733.

Each of the columns 10 and 12 comprises a pair of spaced vertical uprights 20 and 22, the lower ends of which are provided with convergent extensions 24 and 26, respectively, and carried by the upper ends of the uprights 20 and 22 are convergent extensions 28 and 30, respectively, which carry at their convergent ends an upwardly extending pin 32 having secured thereto intermediate its ends an outwardly extending angular stop member 34, the purpose of which will hereinafter appear.

Secured to the lower convergent ends of the extensions 24 and 26 is a horizontally extending bar 36 which forms the base of a truss foot member designated generally 38, said bar being of inverted T-form in cross-section, as best shown in Figure 3; its upstanding flange being indicated at 36'. Extending upwardly from the opposite ends of the bar 36 toward the lower ends of the spaced vertical uprights 20 and 22 are divergent brace bars 40 and 42 which form the major structural braces of the truss 2,725,125 Patented Nov. 29, 1955 2 foot member '38. The upper ends of the bars 40 and 42ers welded or otherwise rigidly secured to the lower ends of the spaced vertical uprights 20 aand22 so as to hold the bar 36 in perpendicular relation to the said spaced 'verticaluprights. Suitable braces 44 extend hetween the bars 36, 40 and '42 in order to form a rigid trussed structure.

Rising from the bar 36 in spaced parallel relation to the spaced vertical uprights 20 and '22 is a vertical upright 46 which is connected to the convergent ends of the convergent extensions 28 and 30 by a horizontal cross-bar 48. The uprights -20 and '22 and 46 are held in spaced parallel relation throughout their length "-by horizontal cross members 50 and diagonal cross members 52 to form a completely trussed structure which will be rigid throughout its 'entirellength.

Carried by the spaced parallel uprights '20 and 22 of the columns are meansforetfectively joining the columns .10 'and 12 into a scaffolding unit. This specific means is shown and described in my copending application. Mounted for vertical sliding movement on 'each column 10 and 12 are carriages which are designated generally by the numerals 64 and 66, and thesecarriagcs are also shown and described in detail in mycopending application. A catwalk 82 is provided to be used by the tender who distributes the "material to be employtd in the construction project. Bars 86 form a supporting arm for planks and define a platform or catwalk. 90 upon which the masons or other workmen engaged in the construction work are supported. Also, a table 98 is provided upon which the materials to be employed in the construction work are deposited. A cable 134 extends downwardly along each respective column, and by means of the cable 134, the platform 18 can be elevated.

In order to facilitate the elevation of materials to the platform 18 when the latter is in elevated position on the columns 10 and 12, a suitable crane arm designated generally 138 is provided for detachable connection to the upper end of each column. Each crane arm comprises a pair of elongated structural units 140 and 142 which are bowed intermediate their ends and an upwardly extending tubular member 144 is also provided. As illustrated, the members 140 converge as they recede from the tubular member 144, and carried by the convergent ends thereof is a suitable attaching ring 146 to which a hoist pulley 148 is attached in any suitable manner. This hoist pulley may have a suitable hoist cable trained thereover to extend downwardly and upon which any suitable container for hoisting material is mounted. The ends of the members 140 and 142 remote from the ring 146 converge as they recede from the tubular member 144 and terminate in a bifurcated portion 152 which receives the pin 32 below the stop member 34. A suitable guide pin 154 is carried by the upper end of the upright 46 of each column and is received in the tubular member 144 in order to hold the crane arm 138 in proper position on the column.

The crane arm is provided with a reinforcing truss bar 156 which is attached at opposite ends to the members 140 and 142 and extends over the top of the tubular member 144.

In use, a pair of the columns 10 and. 12 are selected and moved to the desired position adjacent the structure to be erected and are then arranged in vertical spaced relation with the tie bars 14 and cross braces 16 secured in place to thereby form a complete unit which will remain erect. The planks are placed on their respective supports to form the catwalks 82 and 90, and the table 98, and the cable 134 can be used for elevating the platform formed by the catwalks 82 and 90 and the table 98. Material may be elevated to the platform by mounting the crane arm 138 atop one of the columns and connecting the pulley 148 to the supporting ring 146. Due to the fact that the catwalk 82 is on the side of the column remote from the structure to be built, a tender may move freely along the catwalks 32 Without interfering with the movements of the workmen occupying the catwalk 90 and the materials employed in the construction work can be piled upon the table 98 without interfering with the workmen engaged in the actual construction. Thus, the arrangement of the present invention provides an efficient scafiolding assembly and avoids conflict in carrying out the various operations attendant upon building construction.

It is manifest that the uprights, cross braces and other structural elements employed in constructing the columns, platform crane arm and the like may be of any preferred structural shape that will satisfactorily serve the purpose, and'hence I do not Wish to be limited to the structural shape disclosed in the drawings.

From the foregoing description and a study of the drawings, it will be apparent that I have provided a new construction. It is, of course, to be understood that I reserve the right to make such changes in the form, construction, and arrangement of parts as will not depart from the spirit of the invention or the scope of the appended claim.

What is claimed is:

In a steel scaffolding column, an elongated supporting base bar of inverted T-form in cross-section, a pair of transversely spaced vertical uprights having their lower ends converging and secured at opposite sides of the upstanding flange of said bar at one side of the transverse center thereof, a third upright disposed in spaced centered relation with respect to said pair of uprights and secured at its lower end to said flange, horizontal and diagonal members interconnecting said uprights in parallel relation, a pair of bracing bars extending downwardly from each of opposite sides of the said uprights from points of securement to the outer sides of the latter uprights to points of securement to opposite sides of the outer ends of the flange, and bracing elements interconnecting said bracing bars with said base bar.

References Cited in the file of this patent UNITED STATES PATENTS 926,925 Carmony July 6, 1909 1,179,533 Lachman Apr. 18, 1916 1,584,117 Mitchell May 11, 1926 1,584,691 Bowman May 11, 1926 1,974,659 Sala Sept. 25, 1934 2,257,520 York Sept. 30, 1941 2,345,253 Funk Mar. 28, 1944 2,365,900 Newkirk Dec. 26, 1944 FOREIGN PATENTS 104,388 Great Britain Mar. 2, 1917 678,185 France Mar. 19, 1930 412,485 Great Britain June 28, 1934 

